Nested timelines and progress?

[Wargasmic]

is there any way to set the progress of a nested timeline but have it set the progress of the parent timeline relatively?

 

Say I have a parent timeline with 2 child timelines of 5 second durations, first starting at 0 seconds and the second starting at 5 seconds giving a total duration of 10 seconds. I want to set the progress of the second child to 0.5 which would set the parent timeline to 0.75.

 

Is this possible?

 

 

[GreenSock]

A child shouldn't control its parent, but you can definitely get the effect you're after with a little math. I've wrapped it into a function for you: 

function setChildProgress(animation, progress) {
    var parent = animation.timeline,
        time = animation.startTime() + (animation.duration() * progress); //figure out the position (time) on the parent's timeline
    parent.progress(time / parent.duration());
}

I haven't tested it, but that should work.